JP2006142130A - Method of forming laminated coating film on surface of building - Google Patents

Method of forming laminated coating film on surface of building Download PDF

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JP2006142130A
JP2006142130A JP2004331701A JP2004331701A JP2006142130A JP 2006142130 A JP2006142130 A JP 2006142130A JP 2004331701 A JP2004331701 A JP 2004331701A JP 2004331701 A JP2004331701 A JP 2004331701A JP 2006142130 A JP2006142130 A JP 2006142130A
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coating film
coating
solution
oxidizing agent
building
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Yuichi Ochiai
雄一 落合
Yukio Matsumoto
幸夫 松本
Shinichi Ito
真一 伊藤
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Asahi Glass Polyurethane Material Co Ltd
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Asahi Glass Polyurethane Material Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To form a laminated coating film in which a 2nd coating film is firmly formed on a 1st coating film only by applying a simple undercat treatment at the time of forming the 2nd coating film on the 1st coating film. <P>SOLUTION: After the surface of the 1st coating film is treated with an oxidizing agent solution, the 2nd coating film is applied thereon. The 2nd coating film is preferably a water-proof material coating film. It is preferable that the solvent of the oxidizing agent solution is water and the pH of the oxidizing agent solution ≥10. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、建築物表面への塗膜積層体の形成方法に関する。   The present invention relates to a method for forming a coating film laminate on a building surface.

ビル、集合住宅、戸建住宅等の建築物においては、その表面に種々の塗料を塗付して塗膜を形成させることにより、美観性の向上や建築物の躯体の保護等を図っている。しかし、建築物の表面に形成された塗膜は、屋外において長期にわたり曝露され、日射等の影響により、経時的な劣化が生じてしまう。そのため、数年おきに補修のため塗り替え等が必要とされている。   In buildings such as buildings, apartment houses, and detached houses, various paints are applied to the surface to form a coating film, thereby improving aesthetics and protecting the building's enclosure. . However, the coating film formed on the surface of the building is exposed outdoors for a long period of time, and deterioration over time occurs due to the influence of solar radiation and the like. For this reason, repainting is required every few years for repair.

しかし、塗り替えを行うにあたって、建築物上に形成されている第一の塗膜の上にそのまま第二の塗膜を塗工しても、第二の塗膜は第一の塗膜と充分密着することはできず、剥れ、膨れ等が発生することがあり、さらには、第二の塗膜が建築物の表面から脱落することもある。そのため、第一の塗膜の表面に適切な下地処理を施す必要があった。   However, when repainting, even if the second coating film is applied as it is on the first coating film formed on the building, the second coating film is in close contact with the first coating film. It may not be possible to peel off, swell, or the like, and the second coating film may fall off the surface of the building. Therefore, it was necessary to perform an appropriate ground treatment on the surface of the first coating film.

下地処理方法としては、例えば表面を機械的に粗面化するサンディング処理や、下記特許文献1等に示されているような第一の塗膜の表面に接着剤層を設けるプライマ処理等がある。   Examples of the base treatment method include sanding treatment for mechanically roughening the surface, primer treatment for providing an adhesive layer on the surface of the first coating film as shown in Patent Document 1 below. .

また、複数の塗膜を積層して塗膜積層体を形成する方法として、従来から様々な提案がなされている。例えば下記特許文献2では、基体上に繊維強化樹脂層を形成させ、その上にトップコート樹脂層を形成させ塗膜積層体としている。また、下記特許文献3では、建築物躯体上に、下から水性プライマ、炭素数12〜24の脂肪族モノカルボン酸と炭素数1〜10のモノオールとのエステルの1種または2種以上からなる20℃における粘度が20mPa・s以下の可塑剤を含む無溶剤型ウレタン系塗膜防水材、水性トップコートの順に塗工し、塗膜積層体としている。
特開平6−306305号公報 特開2004−84466号公報 特開2002−250099号公報
In addition, various proposals have conventionally been made as a method of forming a coating film laminate by laminating a plurality of coating films. For example, in Patent Document 2 below, a fiber reinforced resin layer is formed on a substrate, and a topcoat resin layer is formed thereon to form a coating film laminate. Moreover, in the following patent document 3, from the bottom on the building frame, from one or more of an aqueous primer, an ester of an aliphatic monocarboxylic acid having 12 to 24 carbon atoms and a monool having 1 to 10 carbon atoms. The solvent-free urethane-based coating film waterproofing material containing a plasticizer with a viscosity at 20 ° C. of 20 mPa · s or less and an aqueous top coat are applied in this order to form a coating film laminate.
JP-A-6-306305 JP 2004-84466 A JP 2002-250099 A

建築物表面に形成された第一の塗膜の上に第二の塗膜を形成する際において、下地処理方法として、サンディング処理や上記特許文献1等に記載されているプライマ処理は従来から汎用的になされている方法である。しかし多くの手間を要するものであり、また、下地の種類・性状に適合した適切な処理方法の選択が必要であった。   When forming the second coating film on the first coating film formed on the building surface, the primer treatment described in the sanding process or the above-mentioned Patent Document 1 is conventionally widely used as a base treatment method. It is a method that has been made. However, it requires a lot of labor, and it is necessary to select an appropriate treatment method suitable for the type and properties of the substrate.

特にプライマ処理は、下地との接着性を向上させるため、有機系溶剤型のプライマを用いることが一般的である。そして、第一の塗膜の種類によっては、溶解力の高い有機系溶剤(いわゆる強い溶剤)を含むプライマを用いる必要がある場合がある。しかし強い溶剤を含むプライマを使用した場合、下地である第一の塗膜に影響が強く現れてしまい、第一の塗膜の性状よっては、所望の物性を持った塗膜積層体が形成できない等の問題があった。また、溶剤型のプライマは、施工の際に臭気が発生するため、施工業者は注意を払う必要があり、屋上、ベランダ、バルコニー、開放廊下などを改修する場合、居住者なども施工時の臭気に注意を払う必要があった。さらに、近年施工例が増えてきたフッ素系の保護仕上げ材(トップコート)に対しては、たとえ溶解力の高い溶剤を含むプライマで処理を施しても第二の塗膜が第一の塗膜に充分に接着しないことがあった。   In particular, in the primer treatment, an organic solvent type primer is generally used in order to improve adhesion with the base. And depending on the kind of 1st coating film, it may be necessary to use the primer containing the organic solvent (what is called a strong solvent) with high dissolving power. However, when a primer containing a strong solvent is used, the effect of the first coating film, which is the base, appears strongly, and depending on the properties of the first coating film, it is not possible to form a coating laminate having the desired physical properties. There was a problem such as. In addition, solvent-based primers generate odors during construction, so the contractor needs to pay attention.When renovating rooftops, verandas, balconies, open corridors, etc., residents also have odors during construction. There was a need to pay attention to. In addition, for fluorine-based protective finishes (top coats), which have been increasingly used in recent years, the second coating film is the first coating film even if it is treated with a primer containing a solvent with high dissolving power. May not adhere sufficiently.

上記特許文献2によれば、サイディング処理やプライマ処理は特に必要でないが、補修のための塗膜積層体の形成には適用できないものであり、また、手間と費用の要するものであった。   According to the above-mentioned Patent Document 2, siding treatment and primer treatment are not particularly required, but cannot be applied to the formation of a coating film laminate for repair, and require labor and cost.

また、上記特許文献3によれば、溶剤型のプライマを使用しなくてもウレタン系塗膜積層体を形成することができ、臭気等の問題は解決することができるが、やはり補修のための塗膜積層体の形成には適用できないものであった。   Further, according to Patent Document 3, a urethane-based coating film laminate can be formed without using a solvent-type primer, and problems such as odor can be solved. It was not applicable to the formation of a coating film laminate.

したがって、本発明は、上記の問題を解決し、第一の塗膜の上にさらに第二の塗膜を形成する場合において、簡単な下地処理を行うだけで第二の塗膜が第一の塗膜の上に強固に形成される塗膜積層体を形成することを目的とする。   Therefore, the present invention solves the above problem, and when the second coating film is further formed on the first coating film, the second coating film can be formed by simply performing a simple ground treatment. It aims at forming the coating-film laminated body formed firmly on a coating film.

上記目的を達成するため、本発明の塗膜積層体の形成方法は、建築物の表面に形成された第一の塗膜の上にさらに第二の塗膜を形成し、塗膜積層体を形成するための方法であって、前記第一の塗膜の表面を酸化剤溶液で処理した後に前記第二の塗膜を塗工することを特徴とする。ここで前記第二の塗膜が防水材塗膜であることが好ましい。また前記酸化剤溶液の溶剤は水であることが好ましい。さらに前記酸化剤溶液のpHは10以上であることが好ましい。   In order to achieve the above object, the method for forming a coating film laminate of the present invention further comprises forming a second coating film on the first coating film formed on the surface of the building, It is a method for forming, wherein the second coating film is applied after the surface of the first coating film is treated with an oxidant solution. Here, the second coating film is preferably a waterproof coating film. The solvent of the oxidant solution is preferably water. Furthermore, the pH of the oxidant solution is preferably 10 or more.

本発明によれば、簡単な処理で建築物の表面に物性、外観に優れた塗膜積層体を形成することができる。その際、サンディング処理のように粉塵等が生じることなく、また、プライマ処理のように臭気等が問題となるものでないため、環境への負荷が非常に軽減される。   According to this invention, the coating-film laminated body excellent in the physical property and the external appearance can be formed on the surface of a building by simple processing. At that time, dust or the like is not generated as in the sanding process, and odor or the like is not a problem as in the primer process, so that the burden on the environment is greatly reduced.

本発明の塗膜積層体の形成方法は、建築物の表面に形成された第一の塗膜の上にさらに第二の塗膜を形成し、塗膜積層体を形成するための方法であって、第一の塗膜の表面を酸化剤溶液で処理した後に第二の塗膜を塗工することを特徴とする。   The method for forming a coating laminate of the present invention is a method for forming a coating laminate by further forming a second coating on the first coating formed on the surface of the building. Then, after the surface of the first coating film is treated with an oxidant solution, the second coating film is applied.

塗材を建築物表面に塗工し、第一の塗膜が形成された直後であれば、塗膜表層に反応活性点が点在しているため、第二の塗膜をさらに塗工する際において、特に第一の塗膜に処理等を施さなくても密着性を充分確保できる場合がある。しかしながら、一般には塗膜が形成されてから時間が経過すればするほど、第一の塗膜の上に第二の塗膜を塗工し塗膜積層体を形成する際において、第一の塗膜と第二の塗膜との接着性がほとんど得られず、第二の塗膜の剥離や剥落が生じやすくなってしまう。これは、時間の経過と共に塗膜の硬化反応が完結等することにより、第一の塗膜表面の硬化形成時には存在していた反応活性点が減少するためであると考えられる。   If the coating material is applied to the building surface and the first coating film is formed, reaction active points are scattered on the surface of the coating film, so the second coating film is further applied. At that time, there is a case where sufficient adhesion can be secured without particularly treating the first coating film. However, generally, the longer the time elapses after the coating film is formed, the more the first coating is applied when the second coating film is applied on the first coating film to form the coating film laminate. Adhesiveness between the film and the second coating film is hardly obtained, and the second coating film tends to be peeled off or peeled off. This is considered to be due to the fact that the reaction reaction point that existed at the time of the curing formation of the surface of the first coating film decreases due to the completion of the curing reaction of the coating film over time.

しかし、本発明によれば、第一の塗膜が、塗工後長時間経過したものであっても第一の塗膜と第二の塗膜とが強固に結び付いた塗膜積層体を形成することができる。これは、第一の塗膜を酸化剤溶液で処理することで、第一の塗膜の表面の一部を適度に分解等し、反応活性点を再形成させるためであると考えられる。第二の塗膜は、塗膜形成時、すなわち硬化時にこの再形成された反応活性点と結び付くと考えられる。その結果、第二の塗膜は第一の塗膜と強固に結び付き、第一の塗膜と第二の塗膜との間で高い接着性が得られていると推測できる。   However, according to the present invention, even when the first coating film has been applied for a long time after coating, a coating film laminate in which the first coating film and the second coating film are firmly bound is formed. can do. This is presumably because the first coating film is treated with an oxidant solution, so that a part of the surface of the first coating film is appropriately decomposed to regenerate reaction active points. It is considered that the second coating film is associated with the regenerated reactive sites when the coating film is formed, that is, when cured. As a result, it can be inferred that the second coating film is firmly bonded to the first coating film, and high adhesiveness is obtained between the first coating film and the second coating film.

以下本発明の塗膜積層体の形成方法について詳しく説明する。   Hereinafter, the formation method of the coating-film laminated body of this invention is demonstrated in detail.

本発明において第一の塗膜とは、壁面、屋上面、開放廊下面等の建造物の躯体全般の表面に形成された一層または複層の塗膜であり、一般には有機系材料を中心とした材料からなるものである。そして、この第一の塗膜としては、塗料塗膜、防水材塗膜、保護仕上げ材塗膜等が例示できる。また材質の点からは、第一の塗膜としては、ウレタン系塗膜、アクリル系塗膜、エポキシ系塗膜、フッ素系塗膜等が例示できる。ただしウレタン系塗膜とは、ポリオール化合物およびポリアミン化合物と、イソシアネート化合物とを硬化反応させて得られる樹脂に基づく塗膜である。またアクリル系塗膜とは、アクリル酸エステル、メタクリル酸エステル、ヒドロキシアルキルメタアクリル酸エステル等のアクリル系単量体を硬化反応させて得られる樹脂に基づく塗膜である。またエポキシ系塗膜とは、エポキシ基を有する単量体を硬化反応させて得られる樹脂に基づく塗膜である。またフッ素系塗膜とは、フッ素原子を分子内に有する単量体を重合反応させて得られる樹脂に基づく塗膜である。このフッ素系塗膜を得るための原料樹脂としては、ペンウォルト社の商品名「カイナー」、旭硝子社の商品名「ルミフロン」、ダイキン社の商品名「ゼッフル」などが例示できる。   In the present invention, the first coating film is a single-layer or multi-layer coating film formed on the entire surface of a building frame such as a wall surface, a roof top surface, an open corridor bottom surface, etc. It is made of the material. And as this 1st coating film, a paint coating film, a waterproof material coating film, a protective finish material coating film etc. can be illustrated. From the viewpoint of materials, examples of the first coating film include a urethane coating film, an acrylic coating film, an epoxy coating film, and a fluorine coating film. However, the urethane-based coating film is a coating film based on a resin obtained by curing reaction of a polyol compound, a polyamine compound, and an isocyanate compound. The acrylic coating film is a coating film based on a resin obtained by a curing reaction of an acrylic monomer such as an acrylic ester, a methacrylic ester, or a hydroxyalkyl methacrylic ester. Moreover, an epoxy-type coating film is a coating film based on resin obtained by carrying out hardening reaction of the monomer which has an epoxy group. Moreover, a fluorine-type coating film is a coating film based on resin obtained by carrying out the polymerization reaction of the monomer which has a fluorine atom in a molecule | numerator. Examples of the raw material resin for obtaining the fluorine-based coating film include Penwalt's trade name “Kyner”, Asahi Glass's trade name “Lumiflon”, and Daikin's trade name “Zeffle”.

本発明においては、第一の塗膜がフッ素系塗膜である場合に特に有効である。第一の塗膜がフッ素系塗膜である場合には、通常、機械的に塗膜を粗面化し、さらにプライマを塗工するという手間のかかる下地処理が必要不可欠であった。しかし、本発明によれば非常に簡単な下地処理のみで、接着性に優れた塗膜積層体が得られる。   In the present invention, it is particularly effective when the first coating film is a fluorine-based coating film. When the first coating film is a fluorine-based coating film, usually a time-consuming ground treatment of mechanically roughening the coating film and further applying a primer is indispensable. However, according to the present invention, a coating laminate having excellent adhesion can be obtained only by a very simple ground treatment.

また、この第一の塗膜は、建築物に表面に塗工されてから経過した時間は任意のものであってよく、本発明においては、長期間経過した場合、すなわち、補修のための塗り替えを行う際において特に効果的である。   In addition, the first coating film may have any time elapsed since it was applied to the surface of the building. In the present invention, when a long time has elapsed, that is, repainting for repair. It is particularly effective when performing

具体的には、第一の塗膜は、建築物上に形成されてから24時間(1日)以上の経過したものである場合が好適であり、3日以上経過したものである場合がより好適であり、1週間以上経過したものである場合がさらに好適であり、1ヶ月以上経過したものである場合が特に好適である。なお、この時間に上限はないが、第一の塗膜が崩壊し、死膜となっているような状況では、第一の塗膜の上に第二の塗膜を形成すること自体に問題があるので通常の上限は20年程度である。   Specifically, the case where the first coating film has been formed for 24 hours (one day) or more after being formed on the building is preferable, and the case where three days or more have passed is more preferable. More preferably, the case where one week or more has passed is further preferred, and the case where one month or more has passed is particularly preferred. Although there is no upper limit for this time, in the situation where the first coating film collapses and becomes a dead film, there is a problem in forming the second coating film on the first coating film itself. Therefore, the usual upper limit is about 20 years.

本発明において、酸化剤溶液による第一の塗膜の表面の処理方法としては、第一の塗膜の表面に酸化剤溶液を塗布するだけでよく、必要に応じて過剰の溶液を除去し乾燥させればよい。酸化剤溶液による処理時間としては、1時間以上が好ましく、2時間以上がより好ましい。酸化剤溶液による処理時間の上限は特にないが、通常24時間までである。すなわち酸化剤溶液を塗布し、例えば約2時間放置することで酸化剤溶液処理を完了する。その後過剰の溶液を除去して乾燥させることが好ましい。除去方法は、水切り具等で除去してもよいが、溶剤が水または水溶性有機溶剤の場合には水洗することが特に好ましい。乾燥時間としては、気温等の環境条件により左右されるが、30分以上が好ましく、60分以上がより好ましい。そして塗布の方法としては、噴霧による塗布;刷毛、ローラ、モップ、スポンジ等を用いた塗布等が例示できる。   In the present invention, as a method of treating the surface of the first coating film with the oxidant solution, it is only necessary to apply the oxidant solution to the surface of the first coating film. If necessary, the excess solution is removed and dried. You can do it. As processing time by an oxidizing agent solution, 1 hour or more is preferable and 2 hours or more are more preferable. The upper limit of the treatment time with the oxidant solution is not particularly limited, but is usually up to 24 hours. That is, the oxidizing agent solution is applied and left for about 2 hours, for example, to complete the oxidizing agent solution treatment. Thereafter, it is preferable to remove the excess solution and dry it. The removal method may be performed with a drainer or the like, but when the solvent is water or a water-soluble organic solvent, washing with water is particularly preferable. Although drying time is influenced by environmental conditions, such as temperature, 30 minutes or more are preferable and 60 minutes or more are more preferable. Examples of the application method include application by spraying; application using a brush, roller, mop, sponge, and the like.

酸化剤溶液に用いる酸化剤としては、酸化力を有する化合物であればよく、特に限定はない。また、2種以上の酸化剤を併用してもよい。また、酸化剤溶液の溶剤としてはメタノール、エタノール、ブタノール等の水溶性有機溶剤;ミネラルターペン、ガソリン、エチルシクロヘキサン等の有機溶剤;および水等が例示できる。このうち溶剤として水を用いた酸化剤水溶液が、溶液の安定性の点、環境への負荷が小さい点、第一の塗膜に対する膨潤等の影響がほとんどない点で好ましい。特に溶剤として水を用いることにより、第一の塗膜の膨潤、膨れ、第一の塗膜の基体(躯体)からの剥離等を抑制することができ、外観の良好な塗膜積層体を形成できる。   The oxidizing agent used in the oxidizing agent solution is not particularly limited as long as it is a compound having oxidizing power. Two or more oxidizing agents may be used in combination. Examples of the solvent for the oxidant solution include water-soluble organic solvents such as methanol, ethanol, and butanol; organic solvents such as mineral terpenes, gasoline, and ethylcyclohexane; and water. Among these, an aqueous oxidizer solution using water as a solvent is preferable in terms of stability of the solution, a small environmental load, and little influence such as swelling on the first coating film. In particular, by using water as a solvent, it is possible to suppress swelling and swelling of the first coating film, peeling of the first coating film from the substrate (housing), etc., and form a coating film laminate with a good appearance. it can.

酸化剤溶液の具体例としては、過酸化物、オキソ酸の溶液が挙げられる。過酸化物の例としては、過酸化水素が挙げられる。またオキソ酸の例としては、塩素酸類、亜塩素酸類、次亜塩素酸類が例示できる。ただし塩素酸類とは遊離の塩素酸およびその塩を意味し、亜塩素酸類、次亜塩素酸類も同様である。   Specific examples of the oxidizing agent solution include peroxide and oxo acid solutions. An example of a peroxide is hydrogen peroxide. Examples of oxo acids include chloric acids, chlorous acids, and hypochlorous acids. However, chloric acid means free chloric acid and its salt, and the same applies to chlorous acid and hypochlorous acid.

これらの酸化剤溶液としては、溶剤が水である酸化剤水溶液が好ましい。また、酸化剤水溶液のうち工業的にも比較的入手が容易である点から、過酸化水素水、次亜塩素酸類の水溶液が特に好ましい。次亜塩素酸類の水溶液としては、次亜塩素酸ナトリウム水溶液、次亜塩素酸カルシウム水溶液(さらし粉水溶液)が例示できる。   As these oxidizing agent solutions, an oxidizing agent aqueous solution in which the solvent is water is preferable. Of the oxidizing agent aqueous solutions, aqueous hydrogen peroxide and hypochlorous acid aqueous solutions are particularly preferred because they are relatively easy to obtain industrially. Examples of the aqueous solution of hypochlorous acid include sodium hypochlorite aqueous solution and calcium hypochlorite aqueous solution (bleaching powder aqueous solution).

さらに、酸化剤溶液には、アルカリ金属の水酸化物、アルカリ土類金属の水酸化物を含有しても良い。   Further, the oxidant solution may contain an alkali metal hydroxide or an alkaline earth metal hydroxide.

アルカリ金属の水酸化物およびアルカリ土類金属の水酸化物は、酸化剤溶液のpHを調整する目的で使用することが好ましい。これらの水酸化物としては、水酸化リチウム、水酸化ナトリウム、水酸化カリウム、水酸化ルビジウム、水酸化セシウム、水酸化カルシウム、水酸化ストロンチウム、水酸化バリウム、水酸化ラジウムなどが挙げられ、水酸化ナトリウム、水酸化カリウム、水酸化カルシウムが好ましく、特に水酸化ナトリウムが好ましい。   Alkali metal hydroxides and alkaline earth metal hydroxides are preferably used for the purpose of adjusting the pH of the oxidant solution. Examples of these hydroxides include lithium hydroxide, sodium hydroxide, potassium hydroxide, rubidium hydroxide, cesium hydroxide, calcium hydroxide, strontium hydroxide, barium hydroxide, and radium hydroxide. Sodium, potassium hydroxide, and calcium hydroxide are preferable, and sodium hydroxide is particularly preferable.

本発明において酸化剤溶液の酸化剤濃度は特に限定されないが、0.1〜10質量%であることが好ましく、より好ましくは1〜5質量%である。酸化剤濃度が0.1質量%以上であれば、第一の塗膜と第二の塗膜との接着性が充分発揮される点で好ましい。また酸化剤の濃度が10質量%以下であると、酸化剤溶液の管理および取扱いが容易である点で好ましい。   In the present invention, the oxidant concentration of the oxidant solution is not particularly limited, but is preferably 0.1 to 10% by mass, and more preferably 1 to 5% by mass. If the oxidizing agent concentration is 0.1% by mass or more, it is preferable in that the adhesion between the first coating film and the second coating film is sufficiently exhibited. Moreover, it is preferable that the concentration of the oxidant is 10% by mass or less because the management and handling of the oxidant solution is easy.

また、酸化剤溶液のpHは特に限定されないが、10以上であることが好ましい。pHが10以上であると、酸化剤溶液が安定になる、第一の塗膜と第二の塗膜との接着性が向上する等の点で好ましい。   Moreover, the pH of the oxidizing agent solution is not particularly limited, but is preferably 10 or more. A pH of 10 or more is preferable in that the oxidizing agent solution becomes stable and the adhesion between the first coating film and the second coating film is improved.

本発明において第一の塗膜の上に形成させる第二の塗膜とは、一層または複層の塗膜であり、第一の塗膜と同じでものであってもよく異なっていてもよい。第二の塗膜としては、塗料塗膜、防水材塗膜、保護仕上げ材塗膜等が例示できる。また、材質の点からは、第二の塗膜としては、ウレタン系塗膜、アクリル系塗膜、エポキシ系塗膜、フッ素系塗膜等が例示できる。このうち第二の塗膜としては、防水材塗膜が好ましい。   In the present invention, the second coating film formed on the first coating film is a single-layer or multi-layer coating film, and may be the same as or different from the first coating film. Examples of the second coating film include a paint coating film, a waterproof coating film, and a protective finish coating film. In terms of material, examples of the second coating film include a urethane coating film, an acrylic coating film, an epoxy coating film, and a fluorine coating film. Of these, a waterproof coating is preferred as the second coating.

一般に防水材塗膜を用いて防水層を形成する塗膜防水工法においては、信頼性等の観点から防水材塗膜を0.1〜5mm程度の厚膜とすることが要請されている。そして、このような厚さの塗膜を下地(第一の塗膜)に強固に接着させるため、通常色々な工夫と前処理が必要とされている。特に、第一の塗膜がフッ素系の保護仕上げ材で形成されている場合、従来非常に手間やコストのかかる高度な下地処理を施さなくては信頼性の高い防水材塗膜を形成することは困難であった。   In general, in a waterproof coating method for forming a waterproof layer using a waterproof coating film, it is required that the waterproof coating film has a thickness of about 0.1 to 5 mm from the viewpoint of reliability and the like. In order to firmly adhere the coating film having such a thickness to the base (first coating film), various devices and pretreatments are usually required. In particular, when the first coating film is made of a fluorine-based protective finishing material, a highly reliable waterproof coating film must be formed without the use of advanced surface treatment that is very laborious and expensive. Was difficult.

しかし、本発明によれば、例えば次亜塩素酸ナトリウム水溶液をフッ素系の保護仕上げ材の表面に塗布するだけで、該保護仕上げ材の上に信頼性の高い塗膜防水層(例えばウレタン塗膜防水層)を形成することができる。すなわち、本発明は、第二の塗膜として防水層を有する塗膜層を形成する際に特に好適である。   However, according to the present invention, for example, an aqueous sodium hypochlorite solution is simply applied to the surface of a fluorine-based protective finish, and a highly reliable waterproof coating (e.g., urethane coating) is applied on the protective finish. Waterproof layer) can be formed. That is, the present invention is particularly suitable when forming a coating film layer having a waterproof layer as the second coating film.

また、時間の経過と共に、酸化剤溶液で第一の塗膜を処理することで再形成された第一の塗膜上の反応活性点が徐々に減少してく可能性があり、酸化剤溶液で第一の塗膜を処理しても密着性が充分に得られなくなる虞れがあるため、酸化剤溶液で第一の塗膜を処理した後、30日以内に第二の塗膜を塗工することが好ましく、7日以内とすることがより好ましく、3日以内とすることがさらに好ましい。   In addition, with the passage of time, there is a possibility that the reaction active points on the first coating film regenerated by treating the first coating film with the oxidizer solution may gradually decrease. Since there is a possibility that sufficient adhesion cannot be obtained even if the first coating film is processed, the second coating film is applied within 30 days after the first coating film is processed with the oxidizing agent solution. Preferably, it is within 7 days, more preferably within 3 days.

以下、本発明を実施例(1〜36)、比較例(1、2)を挙げて具体的に説明するが、本発明はこれらに限定されない。   EXAMPLES Hereinafter, although an Example (1-36) and a comparative example (1,2) are given and this invention is demonstrated concretely, this invention is not limited to these.

[酸化剤溶液の調整]
溶剤として水を用い、次亜塩素酸ナトリウム、過酸化水素、水酸化ナトリウムをそれぞれ、表1および表2の配合で調合し、合成例1〜18の酸化剤溶液を調整した。それぞれの酸化剤溶液のpHを併せて表1および表2に示す。
[Preparation of oxidizer solution]
Water was used as a solvent, and sodium hypochlorite, hydrogen peroxide, and sodium hydroxide were prepared according to the formulations shown in Tables 1 and 2, respectively, to prepare the oxidizing agent solutions of Synthesis Examples 1 to 18. The pH of each oxidizing agent solution is shown together in Table 1 and Table 2.

Figure 2006142130
Figure 2006142130

Figure 2006142130
Figure 2006142130

[下地塗膜の作製]
[製造例1]
スレート版にフッ素樹脂系塗料(商品名;「サラセーヌTフッ素」 旭硝子ポリウレタン建材社製)を塗布量0.15kg/mで塗工し、1ヶ月間乾燥させた。
[Preparation of undercoat]
[Production Example 1]
The slate plate was coated with a fluororesin-based paint (trade name: “Sarah Seine T Fluorine” manufactured by Asahi Glass Polyurethane Building Materials Co., Ltd.) at a coating amount of 0.15 kg / m 3 and dried for one month.

[製造例2]
スレート版にウレタン樹脂系塗料(商品名;「サラセーヌK」 旭硝子ポリウレタン建材社製)を塗布量2.0kg/mで塗工し、1ヶ月間乾燥させた。
[Production Example 2]
The slate plate was coated with a urethane resin-based paint (trade name; “SARASEINE K” manufactured by Asahi Glass Polyurethane Building Materials Co., Ltd.) at a coating amount of 2.0 kg / m 3 and dried for one month.

[製造例3]
スレート版にアクリル樹脂系塗料(商品名;「サラセーヌT」 旭硝子ポリウレタン建材社製)を塗布量0.15kg/mで塗工し、1ヶ月間乾燥させた。
[Production Example 3]
The slate plate was coated with an acrylic resin-based paint (trade name: “SARASEINE T” manufactured by Asahi Glass Polyurethane Building Materials Co., Ltd.) at an application amount of 0.15 kg / m 3 and dried for one month.

[製造例4]
スレート版にウレア樹脂系塗料(商品名;「サラセーヌSV」 旭硝子ポリウレタン建材社製)を塗布量0.15kg/mで塗工し、1ヶ月間乾燥させた。
[Production Example 4]
A urea resin-based paint (trade name: “SARASEINE SV” manufactured by Asahi Glass Polyurethane Building Materials Co., Ltd.) was applied to the slate plate at an application amount of 0.15 kg / m 3 and dried for one month.

<試験例1>
〔実施例1〜18〕
製造例1〜4の下地塗膜に、合成例1の酸化剤溶液を塗布し、2時間そのまま放置し、水洗後60分間乾燥させた。その後、酸化剤溶液で処理された製造例1〜4の下地塗膜に、上塗り塗膜としてウレタン樹脂系塗料(商品名;「サラセーヌK」 旭硝子ポリウレタン建材社製)をそれぞれ塗布量2.0kg/mで塗工し、実施例1の塗膜積層体をそれぞれ形成した。
<Test Example 1>
[Examples 1 to 18]
The oxidizing agent solution of Synthesis Example 1 was applied to the base coating films of Production Examples 1 to 4, left as it was for 2 hours, washed with water and dried for 60 minutes. Thereafter, a urethane resin-based paint (trade name; “SARASEINE K” manufactured by Asahi Glass Polyurethane Building Materials Co., Ltd.) was applied as an overcoating film to each of the base coating films of Production Examples 1 to 4 treated with an oxidant solution. Coating was performed at m 3 to form the coating film laminates of Example 1, respectively.

〔実施例2〜18〕
酸化剤溶液として合成例2〜18の酸化剤溶液を用いた以外は実施例1と同様にして実施例2〜18の塗膜積層体をそれぞれ形成した。
[Examples 2 to 18]
Except having used the oxidizing agent solution of the synthesis examples 2-18 as an oxidizing agent solution, it carried out similarly to Example 1, and formed the coating film laminated body of Examples 2-18, respectively.

〔比較例1〕
酸化剤溶液による処理を行わなかった以外は実施例1と同様にして比較例1の塗膜積層体をそれぞれ形成した。
[Comparative Example 1]
A coating film laminate of Comparative Example 1 was formed in the same manner as in Example 1 except that the treatment with the oxidant solution was not performed.

実施例1〜18および比較例1の塗膜形成体を7日間23℃で養生後、JIS K 6854−2に準拠し、剥離速度200mm/分で180度剥離試験を行い、下地途膜と上塗り塗膜との密着性を評価した。表3および表4に結果をまとめて示す。なお表中の上段は、25mm幅あたりの平均密着強度(単位;N/25mm)を示す。また、下段は、塗膜が破断した箇所を示し、下地塗膜と上塗り塗膜との層間で剥離破断した場合をA、上塗り塗膜が破断した場合をBとした。














After the coating film forming bodies of Examples 1 to 18 and Comparative Example 1 were cured at 23 ° C. for 7 days, a 180 ° peeling test was performed at a peeling speed of 200 mm / min in accordance with JIS K 6854-2, and the undercoat film and the top coat were applied. The adhesion with the coating film was evaluated. Tables 3 and 4 summarize the results. In addition, the upper stage in a table | surface shows the average contact | adhesion intensity | strength (unit; N / 25mm) per 25 mm width. Moreover, the lower stage showed the location where the coating film broke, and it was set as A when the peeling rupture occurred between the layers of the base coating film and the top coating film, and B when the top coating film was broken.














Figure 2006142130
Figure 2006142130

Figure 2006142130
Figure 2006142130

上記試験例1の結果から、下地塗膜を酸化剤溶液で処理した実施例1〜18の塗膜積層体は、下地塗膜がフッ素樹脂系塗膜、ウレタン樹脂系塗膜、アクリル樹脂系塗膜、およびウレア樹脂系塗膜のいずれであっても約30N/25mm以上の高い密着強度が得られており、下地塗膜の材質によらず、下地塗膜と上塗り塗膜との接着性が良好であることが分る。なかでもpHを10以上の酸化剤溶液を用いた実施例1〜12では、特に高い密着強度が得られた。   From the results of Test Example 1 above, in the coating film laminates of Examples 1 to 18 in which the base coating film was treated with an oxidant solution, the base coating film was a fluororesin coating film, a urethane resin coating film, and an acrylic resin coating coating. High adhesion strength of about 30 N / 25 mm or more is obtained for both the film and the urea resin-based coating film, and the adhesion between the base coating film and the top coating film is independent of the material of the base coating film. It turns out that it is good. In particular, in Examples 1 to 12 using an oxidizer solution having a pH of 10 or more, particularly high adhesion strength was obtained.

一方、酸化剤溶液による表面処理を行っていない比較例1では、下地塗膜と上塗り塗膜とが同一のものである場合、すなわち下地塗膜がウレタン樹脂系塗膜である場合は比較的高い密着強度が得られているが、それ以外の場合は密着強度が15N/25mm程度であり、充分な密着性を確保することができず、上塗り塗膜が容易に剥離しやすいものであった。   On the other hand, in Comparative Example 1 in which the surface treatment with the oxidant solution is not performed, when the base coating film and the top coating film are the same, that is, when the base coating film is a urethane resin coating film, it is relatively high. Adhesion strength was obtained, but in other cases, the adhesion strength was about 15 N / 25 mm, sufficient adhesion could not be ensured, and the top coat film was easily peeled off.

<試験例2>
〔実施例19〕
製造例1〜4の下地塗膜に、合成例1の酸化剤溶液を塗布し、2時間そのまま放置し、水洗後60分間乾燥させた。その後、酸化剤溶液で処理された製造例1〜4の下地塗膜に、上塗り塗膜として水性アクリル樹脂系塗料(商品名;「サラセーヌTW」 旭硝子ポリウレタン建材社製)をそれぞれ塗布量0.15kg/mで塗工し、実施例19の塗膜積層体をそれぞれ形成した。
<Test Example 2>
Example 19
The oxidizing agent solution of Synthesis Example 1 was applied to the base coating films of Production Examples 1 to 4, left as it was for 2 hours, washed with water and dried for 60 minutes. Thereafter, a water-based acrylic resin-based paint (trade name: “SARASEINE TW” manufactured by Asahi Glass Polyurethane Building Materials Co., Ltd.) is applied as an overcoating film to the undercoat films of Production Examples 1 to 4 treated with an oxidizing agent solution. / M 3 was applied to form a coating film laminate of Example 19.

〔実施例20〜36〕
酸化剤溶液として合成例2〜18の酸化剤溶液を用いた以外は実施例19と同様にして実施例20〜36の塗膜積層体をそれぞれ形成した。
[Examples 20 to 36]
Coating film laminates of Examples 20 to 36 were formed in the same manner as in Example 19 except that the oxidizing agent solutions of Synthesis Examples 2 to 18 were used as the oxidizing agent solution.

〔比較例2〕
酸化剤溶液による処理を行わなかった以外は実施例19と同様にして比較例2の塗膜積層体をそれぞれ形成した。
[Comparative Example 2]
A coating film laminate of Comparative Example 2 was formed in the same manner as in Example 19 except that the treatment with the oxidizing agent solution was not performed.

実施例19〜36および比較例2の塗膜形成体を2日間23℃で養生後、JIS K 5600 5−6に準拠した付着性(クロスカット法)試験を行い密着性を評価し、下地塗膜から剥離した上塗り塗膜の面積を測定した。表5および表6に結果をまとめて示す。   After the coating film formed bodies of Examples 19 to 36 and Comparative Example 2 were cured at 23 ° C. for 2 days, an adhesion (cross-cut method) test according to JIS K 5600 5-6 was performed to evaluate the adhesion, and the base coating The area of the top coat film peeled from the film was measured. Tables 5 and 6 summarize the results.

Figure 2006142130
Figure 2006142130









Figure 2006142130
Figure 2006142130

上記試験例2の結果より、下地塗膜を酸化剤溶液で処理した実施例19〜36の塗膜積層体は、下地塗膜の種類によらず下地塗膜と上塗り塗膜との接着性が良好であった。   From the results of Test Example 2, the coating film laminates of Examples 19 to 36 in which the base coating film was treated with an oxidant solution had adhesiveness between the base coating film and the top coating film regardless of the type of the base coating film. It was good.

一方、酸化剤溶液による表面処理を行っていない比較例2では、下地塗膜と上塗り塗膜との界面での剥離が生じており、全く密着していなかった。   On the other hand, in Comparative Example 2 in which the surface treatment with the oxidant solution was not performed, peeling occurred at the interface between the base coating film and the top coating film, and there was no adhesion.

よって、本発明によれば、第一の塗膜(下地塗膜)および第二の塗膜(上塗り塗膜)の種類や材質に関係なく、下地処理として、第一の塗膜に酸化剤溶液を塗布するという極めて簡易な方法を施すだけで、第二の塗膜との接着性を向上させ、第一の塗膜と第二の塗膜とが強固に接着された塗膜積層体を形成することができる。   Therefore, according to the present invention, regardless of the type and material of the first coating film (undercoat film) and the second coating film (top coat film), the oxidizer solution is applied to the first coating film as the base treatment. By simply applying a very simple method of coating, the adhesion with the second coating film is improved, and a coating film laminate in which the first coating film and the second coating film are firmly bonded is formed. can do.

本発明の塗膜積層体の形成方法によれば、建築物の表面に、簡単な方法で、物性・外観に優れた塗膜積層体を形成することができ、塗り替えなどに好適である。
According to the method for forming a coating laminate of the present invention, a coating laminate having excellent physical properties and appearance can be formed on the surface of a building by a simple method, which is suitable for repainting and the like.

Claims (4)

建築物の表面に形成された第一の塗膜の上にさらに第二の塗膜を形成し、塗膜積層体を形成するための方法であって、
前記第一の塗膜の表面を酸化剤溶液で処理した後に前記第二の塗膜を塗工することを特徴とする塗膜積層体の形成方法。
A method for further forming a second coating film on the first coating film formed on the surface of the building and forming a coating film laminate,
A method for forming a coating film laminate, wherein the second coating film is applied after the surface of the first coating film is treated with an oxidant solution.
前記第二の塗膜が防水材塗膜である請求項1に記載の塗膜積層体の形成方法。   The method for forming a coating film laminate according to claim 1, wherein the second coating film is a waterproof coating film. 前記酸化剤溶液の溶剤が水である請求項1または2に記載の塗膜積層体の形成方法。   The method for forming a coating film laminate according to claim 1, wherein the solvent of the oxidant solution is water. 前記酸化剤溶液のpHが10以上である請求項1〜3のいずれか一つに記載の塗膜積層体の形成方法。   The method for forming a coating film laminate according to any one of claims 1 to 3, wherein the pH of the oxidizing agent solution is 10 or more.
JP2004331701A 2004-11-16 2004-11-16 Method of forming laminated coating film on surface of building Pending JP2006142130A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015229905A (en) * 2014-06-06 2015-12-21 株式会社ダイフレックス Repair method for waterproof sheet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015229905A (en) * 2014-06-06 2015-12-21 株式会社ダイフレックス Repair method for waterproof sheet

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